Default Value for schema type 'array' not set about jsonform

[tidoust]

Hi @Chris2m,

True. That's a limitation in current version. I don't have any good ETA for that feature. In the meantime, note that you may achieve a similar effect with the value property. Granted, it's rather meant to convey a previous submitted object, not default values.

For instance, instead of this:

{
  "schema": {
    "arr": {
      "type": "array",
      "items": {
        "type": "string",
      },
      "default": [
        "blah",
        "foo"
      ]
    }
  },
  "form": [
    "arr"
  ]
}

... you could do this:

{
  "schema": {
    "arr": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  },
  "form": [
    "arr"
  ],
  "value": {
    "arr": [
      "blah",
      "foo"
    ]
  }
}

[Chris2m]

Hi @tidoust,

thanks for your response. I am aware of the value property for previously submitted values. Still, in my use case relying on default properties would be a really nice to have feature as I need to distinguish between default values and previously submitted values. I am using JSON Form to implement a configuration page for the backend of a web application.

Right now - building upon the current state of JSON Form - the only feasible solution seems to traverse the entire nested schema and find all the default values of type="array" and then mixin the previously submitted values which seems kind of hacky.

Let me know if I can be of any assistance in adding this feature.

Best,
Chris

[ulion]

In above mentioned commit, it now support all level default values in the schema.

[tchapi]

It seems this is now implemented — please reopen if this is still an issue.

[iphoneintosh]

Is this actually implemented / merged now? Seems like it still does not work on the latest main branch to use default values with arrays.

[TrangPham]

It doesn't seem to work for me either

[sdetweil]

@iphoneintosh @TrangPham yes, its implemented long time ago

else if (isSet(this.schemaElement['default'])) {
        // the value is not provided in the values section but the
        // default is set in the schemaElement (which we have)
        this.value = this.schemaElement['default']
        // We only apply a template if it's a string
        if (typeof this.value === 'string') {
          this.value = _.template(this.value, valueTemplateSettings)(formData);
        }

show the schema

[TrangPham]

I'm using a reference and my default is set in the definitions like so:

{
    "TableColumnsToMatchOrderedListKwargs": {
        "title": "TableColumnsToMatchOrderedListKwargs",
        "type": "object",
        "properties": {
            "column_list": {
                "title": "Column List",
                "default": [
                    "vendor_id",
                    "pickup_datetime",
                    "dropoff_datetime",
                    "passenger_count",
                    "trip_distance",
                    "rate_code_id",
                    "store_and_fwd_flag",
                    "pickup_location_id",
                    "dropoff_location_id",
                    "payment_type",
                    "fare_amount",
                    "extra",
                    "mta_tax",
                    "tip_amount",
                    "tolls_amount",
                    "improvement_surcharge",
                    "total_amount",
                    "congestion_surcharge"
                ],
                "type": "array",
                "items": {
                    "type": "string"
                }
            }
        },
        "additionalProperties": false
    }
}```

would my default still be picked up?